perbandingan uang ayah dan ibu = 3 2/5

ayah : ibu = 1 : 3 2/5 =5/5 : 17/5

selisish ibu - aya h = 17/5-5/5 = 12/5 =480.000

uang ibu = 17/5 : 12/5 x 480.000
               = 17/5 x 5/12 x 480 .000
                =85 /60  x 480.000
                 =Rp. 680.000

jawab.C

A:I = 1:3 2/5 = 5/5 : 17/5
Selisih I:A = 17/5 - 5/5 = 12/5 = 480000
Uang Ibu = 17/5 : 12/5 x 480000
= 17/5 x 5/12 x 480000
= 85/60 x 480000
= 680000
Maaf jika salah